Large-Scale Offshore Hydraulic Piling Hammer

This application claims the priority of Chinese Patent Application No. 202410638853.1, filed with the Chinese Patent National Intellectual Property Administration on May 22, 2024, which is incorporated herein by reference in its entirety as part of the present application.

The present disclosure relates to the technical field of construction machinery, in particular to a large-scale offshore hydraulic piling hammer.

Piling hammers are indispensable equipment for civil engineering works, and utilize impact force to drive piles into the ground to complete the installation of prefabricated piles, in the form such as drop hammers, diesel hammers, steam hammers, hydraulic hammers, vibratory hammers, and static hammers. These piles may be used for establishing foundations of buildings or to carry out works such as geological improvement. The technology of piling hammers has advanced with economic development, and current piling hammers are adaptable to a variety of complex construction environments and requirements.

The applicant has applied for a hydraulic piling hammer with Publication No. CN 107724390 B, which includes a hammer body and a ram capable of moving axially along the hammer body. The hammer body has a space for holding and moving of the ram. The hammer body is a columnar frame. The hammer body is provided with a stamping head fixedly connected to the hammer body and having a conical cross-section. Multiple openings that can be climbed for an operator are formed axially on an outer end face of the frame. A wear rib removably connected to the frame is disposed on an inner wall of the frame. A protector capable of sensing the ram and sending a signal to an external hydraulic system to control its start and stop is disposed in the middle of the frame. Provided is a hydraulic piling hammer with wear-resistant ram and hammer body, which has less impact resistance and is easy to overhaul.

Although the wear of the ram and the hammer body is avoided in the above document, some of piling hammers may be provided with shackles at the top of a hammer housing for connecting a pile body and transferring an impact force, and the shackles at the top of the hammer housing will vibrate by mechanical collision with the hammer body during construction, which will result in pits or wear of the hammer body, and even breaks at the joint between the shackles and the hammer housing, thus leading to safety hazard.

In addition, with respect to the structural form of the nuts and screws of the existing conventional shackles, on the condition that the piling hammer vibrates frequently and violently, the nuts sleeving over the screws are prone to moving, and even falling off from the screws, which will further deepen the safety hazard.

After a long-term use of the piling hammer, there may be break at a connected end of a piston rod with the ram; after the piston rod is broken, a piston will rush into a valve block, causing mechanical collision to the hole and channel; in addition to this, a wear ring on the piston will fall off and enter an oil channel of the valve block, leading to jamming and other faults of valve members and bringing great inconvenience to a subsequent overhaul.

In actual use, different specifications of piles need to match with corresponding pile sleeves of piling hammers, and the pile sleeves of piling hammers have high costs and are cumbersome to replace, affecting the construction efficiency. Accordingly, there is a lack of a piling hammer in the prior art that has high safety and can improve the construction efficiency.

The technical problem to be solved by the present disclosure is to provide a large-scale hydraulic offshore piling hammer capability of reducing safety hazards, prolonging service life and improving construction efficiency to address the above-mentioned disadvantages of the prior art.

In order to achieve the object described above, the present disclosure provides the following technical solutions. A large-scale offshore hydraulic piling hammer, including a hammer housing and a ram in the hammer housing; at least one hydraulic assembly capable of driving the ram to move axially along the hammer housing and disposed between the hammer housing and the ram; a pile sleeve connected to a bottom of the hammer housing and including an upper pile sleeve and a lower pile sleeve; and an anvil disposed in the upper pile sleeve; the hydraulic assembly being capable of driving the ram to strike the anvil, wherein an increased-diameter ring is disposed at a bottom of the anvil in the upper pile sleeve, a first mounting groove for mounting the anvil is formed at a top of the increased-diameter ring, a first mounting cavity is formed between an inner cavity of the increased-diameter ring and the anvil, a second mounting cavity is formed between a bottom surface of the increased-diameter ring and an inner wall of the lower pile sleeve, and the second mounting cavity has a diameter greater than a diameter of the first mounting cavity.

According to the above technical solutions, with the increased-diameter ring, the anvil is mounted in the first mounting groove on the increased-diameter ring, construction on piles having a larger diameter may be carried out, the size of the anvil and increased-diameter ring may be determined as required, and the first mounting cavity and the second mounting cavity are in a stepped form, which may be fitted to different specifications of piles; when a pile is inserted into the first mounting cavity, the anvil can transfer the impact of the ram directly to the pile; when construction on a pile having a larger diameter is required, the pile is inserted into the second mounting cavity, the top of the pile abuts against the bottom of the increased-diameter ring, the impact of the ram is transferred to the anvil, and then is transferred to the increased-diameter ring from the anvil, thus realizing piling. As a result, there is no need to replace the pile sleeve or make adjustments, and matching with two different specifications of piles can be realized, thus improving adaptability and lowering costs.

A further configuration of the present disclosure is that the hydraulic assembly includes a first cylinder block and a valve block, a piston and piston rods respectively disposed at two axial ends of the piston are slidably disposed in the first cylinder block, the first cylinder block is provided with a hydraulic cavity in which the piston is capable of reciprocating linearly along an axis of the hydraulic cavity, an oil inlet channel in communication with the hydraulic cavity is disposed between the valve block and the first cylinder block, and a limiting boss enabling the piston to be always located in the hydraulic cavity is disposed on a top of the piston.

According to the above technical solutions, as compared with a hydraulic assembly in the existing piling hammer, in the present disclosure, the piston is provided with the limiting boss, the limiting boss enables the piston to be always located in the hydraulic cavity rather than to enter the inside of the valve block when a break occurs at a connected end of the piston rod with the ram, and accordingly, even if the wear ring disposed on the piston falls off, it will not fall into the oil channel of the valve block to cause jamming or other faults of valve members and to affect the subsequent overhaul, which also avoids mechanical collision of the piston to the hole and channel.

A further configuration of the present disclosure is that a first through hole is formed in a middle of the limiting boss, the limiting boss sleeves the piston rod, a diameter of the oil inlet channel is less than a height of the limiting boss, and a diameter of the limiting boss is less than a diameter of the piston.

According to the above technical solutions, the diameter of the oil inlet channel is less than the height of the limiting boss, so that the wear ring is prevented from entering the valve block and always located in the hydraulic cavity; moreover, as the diameter of the limiting boss is less than the diameter of the piston, the limiting boss will not block an oil liquid entering the hydraulic cavity.

A further configuration of the present disclosure is that a ram lifting eye is disposed at a bottom of the piston rod, a thread portion having a thread is disposed at one end of the piston rod, a piston rod nut is disposed between the piston rod and the ram lifting eye, the piston rod nut is connected to the ram lifting eye via a detachable connection structure, the thread portion of the piston rod is threadedly connected with the piston rod nut, and an end portion of the piston rod penetrates a center screw hole of the piston rod nut to abut against the ram lifting eye, a lock clearance is reserved between the piston rod nut and the ram lifting eye.

According to the above technical solutions, the piston rod is threadedly connected with the piston rod nut, the end portion of the piston rod penetrates the center screw hole to prop the nut from the ram lifting eye to produce the lock clearance, thus avoiding that the piston rod nut and the ram lifting eye make a contact with each other to produce a rotation condition; after the piston rod and the ram lifting eye abut against each other closely, the ram lifting eye and the piston rod nut then exert force in dual directions through the detachable connection structure (which may be bolts and nuts, bolts and holes, pin connections, and the like), thus increasing friction between the end portion of the piston rod and the ram lifting eye, avoiding turning or loosening of the piston rod, and improving safety in piling with equipment.

A further configuration of the present disclosure is that a second mounting base for mounting the ram lifting eye is disposed at one end of the ram adjacent to the ram lifting eye, the second mounting base and the ram lifting eye are both provided with connection holes, a ram lifting pin is disposed in the connection holes, one end of the ram lifting pin is provided with an inner thread portion and an outer thread portion that have different pitches, the inner thread portion and the outer thread portion penetrate the connection holes to be respectively connected to an inner nut and an outer nut so as to connect a ram lifting mounting base to the ram lifting eye, a lock clearance is reserved between the inner nut and the outer nut, and the inner nut and the outer nut are connected via a detachable connection structure.

According to the above technical solutions, the threads at the end of the ram lifting pin are fin threads having different pitches (the inner thread portion and the outer thread portion), which may avoid relative rotation between the inner and outer nuts; besides, the ram lifting mounting base and the ram lifting eye are locked and in detachable connection by the ram lifting pin through the inner and outer nuts, thus facilitating mounting and maintenance; moreover, the lock clearance between the inner and outer nuts prevents the inner and outer nuts from being in contact with each other to produce a rotation condition; the inner and outer nuts are connected through the detachable connection structure (which may be bolts and nuts, bolts and holes, pin connection and the like), which can not only bring convenience to mounting and maintenance, but also achieve a locking effect by linkage, thus improving safety in piling with equipment.

A further configuration of the present disclosure is that the hammer housing is provided with a shackle assembly, the shackle assembly includes a shackle body, a shackle pin passing across two ends of the shackle body, and a pin nut at one end of the shackle pin, an annular groove is formed on one end of the shackle pin, the pin nut sleeves the shackle pin and has a first mounting hole at a position corresponding to the annular groove, the first mounting hole runs through an outer wall of the pin nut to an inner wall of the pin nut, a limiting screw is disposed in the first mounting hole, a bottom of the limiting screw is located in the annular groove, a first limiting step is disposed in the first mounting hole, and a double washer is disposed between the first limiting step and the limiting screw.

According to the above technical solutions, since the annular groove and the limiting screw are provided, the limiting screw disposed between the annular groove and the pin nut can prevent the pin nut from retracting and restrain the position of the pin nut on the shackle pin, so that the pin nut will be less prone to moving in any working condition, ensuring the steadiness and safety in connection of the shackle; furthermore, the double washer is provided to further improve the steadiness in connection between the limiting screw and the first mounting hole, avoiding loosening of the limiting screw, and thus achieving stopping of the pin nut.

A further configuration of the present disclosure is that a second mounting hole is formed in an end portion of the shackle pin adjacent to the limiting screw, a safety pin is disposed in the second mounting hole, a third mounting hole transversally runs through a bottom of the safety pin, a clip pin is disposed in the third mounting hole, the clip pin includes a closed ring, a limiting rod and an elastic rod, one end of the limiting rod is connected to the closed ring, and an other end of the limiting rod is provided with a hook; and one end of the elastic rod is connected to the closed ring and an other end of the elastic rod is capable of being fastened with the limiting rod via the hook, and the elastic rod is capable of passing through the third mounting hole.

According to the above technical solutions, the second mounting hole provided facilitates the mounting of the safety pin; besides, the bottom of the safety pin is provided with the third mounting hole and the clip pin, which further avoids a situation in which the safety pin falls off, during assembling, the elastic rod passes through the third mounting hole and then is pressed downward to cross over the hook, and after the elastic rod is located in the hook, the elastic rod is fastened with the limiting rod, thus further improving safety.

A further configuration of the present disclosure is that the shackle body includes a bow, the bow has two ends parallel to each other, shackle arms are disposed at the two ends, the shackle arms are provided with shackle eyes, the bow is provided with a U-shaped groove, and the U-shaped groove is in a form of a semicircle; and a first mounting base is disposed on a top of the hammer housing, a fourth mounting hole corresponding to the shackle eyes is formed in the first mounting base, and the shackle pin is capable of passing through the fourth mounting hole and the shackle eyes to hinge the first mounting base to the first mounting base.

According to the above technical solutions, during assembling, the shackle eyes are aligned with the fourth mounting hole in the first mounting base, the shackle pin then passes through the shackle eyes and the fourth mounting hole, and first and second lock members are assembled with the shackle pin and the pin nut, such a structure is simple and easy to be assembled by an operator; the design of the U-shaped groove can enhance the overall strength of the connection part when the shackle is used for hoisting, helping to disperse the stress to avoid stress concentration at a certain point of the shackle, thus improving the durability and safety of the shackle; moreover, the shackle pin can pass through the fourth mounting hole and the shackle eyes to hinge the shackle body to the first mounting base, thus realizing a rotatable connection between the shackle and the hammer housing, and facilitating the mounting and demounting between the shackle and the hammer housing. With the mounting base, the stability is enhanced, and the mounting base serving as a support point can effectively disperse the force received by the shackle during use to reduce the impact on the hammer housing, thereby prolonging the service life, further improving the safety and avoiding the risk of the shackle accidentally falling off.

A further configuration of the present disclosure is that multiple shackle cushions capable of abutting against the bow are disposed on the top of the hammer housing, a positioning block corresponding to each of the shackle cushions is disposed on the top of the hammer housing, multiple first screw holes are formed in the positioning block, and multiple second screw holes respectively corresponding to the first screw holes are formed in each of the shackle cushions.

According to the above technical solutions, the arrangement of the positioning blocks facilitates the mounting and positioning of the shackle cushions; through the positioning blocks, the mounting positions of the shackle cushions can be determined quickly, and the detachable connection between the shackle cushions and the positioning blocks can be realized by standard parts such as screws; moreover, it can also facilitate the replacement of the shackle cushions to solve the problem of “it is easy to cause deformation and wear of the shackle cushions during long-term use”.

A further configuration of the present disclosure is that multiple first buffer mechanisms are circumferentially disposed, above the increased-diameter ring, on an outer wall of the upper pile sleeve, each of the first buffer mechanisms includes a piston assembly and a second cylinder block in linkage with the piston assembly, the second cylinder block is provided with a cavity in which the piston assembly is capable of reciprocating linearly along an axis of the cavity, and an end portion of the second cylinder block is sealedly connected to an inflation assembly in communication with the cavity; and a shock absorbing chamber integrated with the hammer housing is disposed at a joint between the hammer housing and the upper pile sleeve, an anti-shock ring with one end abutting against the anvil is disposed in the shock absorbing chamber, multiple buffering rings that abut against an inner wall of the shock absorbing chamber and the anti-shock ring are disposed at an other end of the anti-shock ring, and the ram is capable of passing through the buffering rings and the anti-shock ring to strike the anvil.

According to the above technical solutions, the first buffer mechanism is located between the upper pile sleeve and the increased-diameter ring and used for absorbing rebound energy of the increased-diameter ring when a pile having a larger diameter is loaded and subjected to piling; high-pressure nitrogen gas or other inert gas is filled to the cavity by means of the inflation assembly, and pressure of the nitrogen gas filled may be adjusted on the basis of the size of the piling hammer and the geological condition, to be adapted to various working conditions; moreover, during use, the ram is moved axially along the hammer housing, and then passes through the buffering rings and the anti-shock ring to strike the anvil, the anvil strikes the pile into the hard rock stratum, and an anti-shock force is transferred to the anti-shock ring through anvil, and then is transferred to the buffering rings by the anti-shock ring, so that the peak value of the anti-shock force is reduced; besides, the buffering rings stacked in multiple layers will absorb and buffer the anti-shock force and then act onto the entire shock absorbing chamber; as the hammer housing and the shock absorbing chamber are integrated, the anti-shock force that decreases in steps is fed back to the hammer housing through the shock absorbing chamber; the anti-shock force is buffered frequently during the whole process, avoiding excessive shock on inner components of the hammer housing, thus prolonging the service life of the equipment; for shock absorbing chambers in different sizes, the buffering rings in the same specification may be stacked and packed in batch into the shock absorbing chambers, without manufacturing buffering rings in other specifications, thus greatly improving the adaptability of the buffering rings and lowering equipment costs.

The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments.

Reference signs: hammer housing, shackle cushion, second screw hole, first mounting base, fourth mounting hole, positioning block, first screw hole, ram rail, impact chamber, air channel, shock absorbing chamber, anti-shock ring, buffering ring, ram, second mounting base, connection hole, ram lifting pin, inner thread portion, outer thread portion, inner nut, outer nut, hydraulic assembly, first cylinder block, hydraulic cavity, valve block, oil inlet channel, piston, limiting boss, piston rod, thread portion, piston rod nut, ram lifting eye, shackle assembly, shackle body, bow, shackle arm, shackle eye, U-shaped groove, shackle pin, annular groove, second mounting hole, pin nut, first mounting hole, first limiting step, limiting screw, double washer, safety pin, third mounting hole, clip pin, closed ring, limiting rod, hook, elastic rod, pile sleeve, upper pile sleeve, increased-diameter ring, first mounting groove, first mounting cavity, second mounting cavity, anvil, first buffer mechanism, piston assembly, second cylinder block, cavity, inflation assembly, and lower pile sleeve.

The specific embodiment is merely an explanation of the present disclosure and is not a limitation on the present disclosure. A person skilled in the art may make modifications to the embodiment without creative contribution as necessary after reading this specification, and these modifications are protected by the patent law as long as they are within the scope of the claims of the present disclosure.

A large-scale offshore hydraulic piling hammer as shown inincludes a hammer housingand a ramin the hammer housing. At least one hydraulic assemblycapable of driving the ramto move axially along the hammer housingis disposed between the hammer housingand the ram. Preferably, two hydraulic assembliesare used in the present disclosure, which can improve the driving effect to the ram. As shown in, a pile sleeveis connected to the bottom of the hammer housing, the pile sleeveincludes an upper pile sleeveand a lower pile sleeve. An anvilis disposed in the upper pile sleeve, and the hydraulic assemblyis capable of driving the ramto strike the anvil. An increased-diameter ringis disposed at the bottom of the anvilin the upper pile sleeve. A first mounting groovefor mounting the anvilis formed at the top of the increased-diameter ring. A first mounting cavityis formed between an inner cavity of the increased-diameter ringand the anvil. A second mounting cavityis formed between a bottom surface of the increased-diameter ringand an inner wall of the lower pile sleeve. The second mounting cavityhas a diameter greater than a diameter of the first mounting cavity

The hydraulic assemblyas shown inincludes a first cylinder blockand a valve block, a pistonand a piston rodrespectively disposed at two axial ends of the pistonare slidably disposed in the first cylinder block, and the first cylinder blockis provided with a hydraulic cavityin which the pistonis capable of reciprocating linearly along the axis of the hydraulic cavity; an oil inlet channelin communication with the hydraulic cavityis provided between the valve blockand the first cylinder block, and a limiting bossenabling the pistonto be always located in the hydraulic cavityis disposed on the top of the piston; the limiting bossis provided with a first through hole in a middle of the limiting boss, through which the limiting boss sleeves the piston rod, a diameter of the oil inlet channelis less than a height of the limiting boss, and a diameter of the limiting bossis less than a diameter of the piston.

As shown in, the bottom of the piston rodis provided with a ram lifting eye, one end of the piston rodis provided with a thread portionhaving a thread, a piston rod nutis disposed between the piston rodand the ram lifting eye, the piston rod nutis connected to the ram lifting eyevia a detachable connection structure, the thread portionof the piston rodis in threaded connection with the piston rod nut, and an end portion of the piston rodpenetrates a center screw hole of the piston rod nutto abut against the ram lifting eye, a lock clearance is reserved between the piston rod nutand the ram lifting eye.

As shown in, a second mounting basefor mounting the ram lifting eyeis disposed at one end of the ramadjacent to the ram lifting eye, the second mounting baseand the ram lifting eyeare both provided with connection holes, a ram lifting pinis disposed in the connection holes, one end of the ram lifting pinis provided with an inner thread portionand an outer thread portionthat have different pitches, the inner thread portion and the outer thread portionpenetrate the connection holesto be connected to an inner nut and an outer nutso as to connect a ram lifting mounting base to the ram lifting eye, a lock clearance is reserved between the inner nut and the outer nut, and the inner nut and the outer nutare connected via a detachable connection structure.

As shown in, the hammer housingis provided with a shackle assembly, the shackle assemblyincludes a shackle body, a shackle pinpassing across two ends of the shackle body, and a pin nutat one end of the shackle pin; one end of the shackle pinis provided with an annular groove, the pin nutsleeves over the shackle pinand has a first mounting holeat a position corresponding to the annular groove, the first mounting holeruns through an outer wall of the pin nutto an inner wall thereof, a limiting screwis disposed in the first mounting hole, the bottom of the limiting screwis located in the annular groove, a first limiting stepis provided in the first mounting hole, and a double washeris disposed between the first limiting stepand the limiting screw.

As shown in, an end portion of the shackle pinadjacent to the limiting screwis provided with a second mounting hole, a safety pinis disposed in the second mounting hole, a third mounting holetransversally runs through the bottom of the safety pin, a clip pinis disposed in the third mounting hole, the clip pinincludes a closed ring, a limiting rodand an elastic rod, one end of the limiting rodis connected to the closed ring, and the other end of the limiting rod is provided with a hook; one end of the elastic rodis connected to the closed ringand the other end of the elastic rod is capable of being fastened with the limiting rodvia the hook, and the elastic rodis capable of passing through the third mounting hole.

As shown in, the shackle bodyincludes a bow, the bowhas two ends parallel to each other, shackle armsare disposed at the two ends, the shackle armsare provided with shackle eyesrespectively, the bowis provided with a U-shaped groove, and the U-shaped grooveis in the form of a semicircle; a first mounting baseis disposed on the top of the hammer housing, the first mounting baseis provided with a fourth mounting holecorresponding to the shackle eyes, and the shackle pinis capable of passing through the fourth mounting holeand the shackle eyesto hinge the shackle bodyto the first mounting base. As shown in, multiple shackle cushionscapable of abutting against the boware disposed on the top of the hammer housing, a positioning blockcorresponding to each shackle cushionis disposed on the top of the hammer housing, the positioning blockis provided with multiple first screw holes, and multiple second screw holesrespectively corresponding to the first screw holesare formed in each of the shackle cushions.

As shown in, multiple first buffer mechanismsare circumferentially disposed, above the increased-diameter ring, on an outer wall of the upper pile sleeve, each first buffer mechanismincludes a piston assemblyand a second cylinder blockin linkage with the piston assembly, the second cylinder blockis provided with a cavityin which the piston assemblyis capable of reciprocating linearly along the axis of the cavity, and an end portion of the second cylinder blockis sealedly connected to an inflation assemblythat is in communication with the cavity; a shock absorbing chamberintegrated with the hammer housingis provided at the joint between the hammer housingand the upper pile sleeve, an anti-shock ringwith one end abutting against the anvilis disposed in the shock absorbing chamber, multiple buffering ringsthat abut against an inner wall of the shock absorbing chamberand the anti-shock ringare disposed at the other end of the anti-shock ring, and the ramis capable of passing through the buffering ringsand the anti-shock ringto strike the anvil.

In addition, a hammer carrier is disposed inside the hammer housingas shown in. The hammer carrier includes at least two ram rails, and an impact chamberfor the ramto move axially along the ram railsis formed between the ram rails. The cross-section of the body of the hammer housingis circular, and the body of the hammer housingcooperates with the impact chamberto form multiple air channels. Preferably, the number of the ram railsis 8, and the number of the air channelsis 4. By replacing the original square hammer housingwith the circular hammer housing, the problem that welds of the square hammer housingare prone to tearing is solved by utilizing the rigidity and strength inherent in the circular structure, and the circular hammer housing has the advantages of small wear, minimum resistance, and good appearance. Besides, in underwater piling, the circular structure can seal the surface of the housing better than the square structure, so that the housing maintains a high airtightness underwater. The original square ramis adopted in the circular hammer housing, and the rammoves up and down along the hammer carrier, so that portions of the hammer housingthat are not attached by the ramform the air channels, where through guide surfaces that are provided on both sides of each corner of the ram, the ramcan be positioned and guided by 8 ram rails, improving the stability of piling. The ramis disposed in the circular hammer housing, andair channelswill be formed in the hammer housing, so that when the impact hammer drives piles underwater, the air pressure brought out during lifting of the ramwill be quickly discharged through the air channelson the external airtight condition underwater, thus improving the impact force of the impact hammer during underwater piling.

As compared with the circumstance that there are many safety hazards in the prior art, during use of the large-scale offshore hydraulic piling hammer of the present disclosure, the limiting screwand the annular groovecan prevent the pin nut from retracting, thus further improving the stability in connection between the pin nutand the shackle pin; besides, the arrangement of the safety pinand the clip pinplays a role in double insurance, ensuring the steadiness and safety in connection of the shackle; in addition, the shackle cushionsare provided, and the shackle cushionsdistributed on two sides in the rotation direction of the shackle can replace the shackle to collide with the hammer housing, thus protecting the hammer housingand the shackle, avoiding mechanical collision between the shackle and the hammer housing, prolonging service lives of the shackle and the hammer housing, and improving safety in use. Moreover, as compared with a hydraulic assemblyin the existing piling hammer, in the present disclosure, the pistonis provided with the limiting boss, the limiting bossenables the pistonto be always located in the hydraulic cavityrather than to enter the inside of the valve blockwhen a break occurs at the connected end of the piston rodwith the ram, and accordingly, even if the wear ring disposed on the pistonfalls off, it will not fall into the oil channel of the valve blockto cause jamming or other faults of valve members and to affect the subsequent overhaul, which also avoids mechanical collision of the pistonto the hole and channel. Finally, construction on a pile having a larger diameter can be carried out by providing the increased-diameter ringin the upper pile sleeve. When the corresponding pile is inserted into the first mounting cavity, the anvilcan transfer the impact of the ramdirectly to the pile. When construction on a pile having a larger diameter is required, the corresponding large-diameter pile is inserted into the second mounting cavity, the top of the pile abuts against the bottom of the increased-diameter ring, the impact of the ramis transferred to the anvil, and then is transferred to the increased-diameter ringfrom the anvil, thus realizing piling. In this process, there is no need to replace the pile sleeveor make adjustments, and matching with two different specifications of piles can be realized, thus improving adaptability and lowering costs.